Same problem here
Hi Jason
Just installed CSS Form Builder and get the same problem.
Additional info:
I've made all precautions like deleting the dw_cache file, uninstalling universal email, installing in the right order etc....
DW CS4 on Win XP PRO SP3
In the extension manager CSS Form Builder version only shows as 2.0.0, although I've installed the SR1 Build
Greetings
Willi